Stair gauge



FIG. 1 is a front perspective view of a stair gauge embodying my newdesign;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a rear view thereof.

The ornamental design for a stair gauge, as shown and described.